Lock washer-nut.



No. 820,941. PATENTED MAY 15, 1906.

F. S'WARTHOUT. LOOK WASHER NUT.

APPLIOATION FILED JUNBQ, 1905.

5 U ll lFlUE,

were wast-res ltant".

No, saucer.

E'apecification of Letters Patent.

Patented May 15, 1906.

Jlpplicaticn filedfiune 9,1905. Serial No. 264,373.

To all whom it may cancer-m2 Be it known that I, FRANK Sw'An'rHoU'r, a citizen of the United States, residing at Saginew, in the county of Saginaw, State of Michig an, have invented a new and useful Lock Washer-Nut, of which the following is a speci- My invention relates to lock-nuts composed of-three parts, of which there are two jaws with a sectional washer attached to each and the nut or locking device.

Figure 1 represents a face view of the nut, showing shape of the hole a through the nut. Fig. 2 represents one of the two jaws, show ing sectional washer h at one end, also the small shoulder at opposite end of jaw. Fig. 3 represents the two jaws in position in the nut and the formingof a complete washer by the two sections 1). Fig. trepresents the nut in use on a bolt. Fig. 5 represents one of the jaws with the lniaring-uuri ace l) hexagon sha e. r

ach half of the hole in thenut is oiiset from the center, making it a double eccen trio. The jaws are also made on an eccen trio, so as to bring the threaded artsfof the jaws together in the center oi tie nut to re ceive the bolt. The hole in the nut isso formed as to bring the shoulders at in the hole in the nut against the wide sides 0 of the jaws in order that the nut may be turned on like an ordinary nut.

The small shoulder c, as may be seen in Fi n 2, at the end. of the jaw by fitting into a b n '0 corresponding countersunk place in the nut prevents it from slipping oil the jaws when in use.

The washer or bearing-surface b may be any shape desired, as shown in Figs. 2 and 5.

It is round when the nut is to remain pern1anently in position, and when it is to be re moved it is then made the same shape as the nut.

The term sectional washer? is the flange b on the 'aws, and as the two form acornplete was er or bearing-surface for the nut when the jaws are placed in position each flange won 01 be a section of a washer.

When the nut is being turned on, it is always unlocked, as the jaws are being turned on the bolt by the shoulders cl in the nut.

To look the nut after it is turned on sulficiently tight, reverse the motion, as if to turn it off, and the nut slides upon the jaws, changing the relation of the diameters of the hole in the nut and the jaws, forcing the threads of the jaws :[irnily into the threads of the bolt.

To remove the nut, first turn as it to tighten it. By this motion the nut turns on the jaws, releasing the pressure on them and unlocking them and allowing them to be turned on the bolt by bringing the longest diameter of the hole in the nut to correspond with the lon est diameter oi the jaws. This brings-the shoulders (I up against the wide sides 6 of the jaws, and the faces 9 of the washer, as shown in llig. 5, are then parallel with the sides of the nilt and allowing the wrench to slip u so as to include the washer with the nut. .l hen all may be turned off to gether.

A nut such as I have described as my in-- vention is shown applied on a bolt in Fig. 4, showing the solid washer b or bearingsurface held in an immovable osition by the firm. locking of the jaws, and thereby preventing the nut from receiving any friction or jar tending to loosen or unlock it, making it absolutely a perfect loch-nut.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent The combination of two jaws screw threaded for engagement with a bolt, ,the'outside surface of each jaw being eccentric, each of said jaws having at one end thereof a bearing-suriace and at the other end a shoulder,- and an unthreaded nut the bore in said nut FRANK swnarnour.

Witnesses: ALBERT V. LINTon, J. A. Mn'rrnnws. 

